netdev - Re: [PATCH v5 net-next 10/10] dt-bindings: net: korina: Add DT bindings for IDT 79RC3243x SoCs

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Date:   Fri, 16 Apr 2021 14:11:04 -0500
From:   Rob Herring <robh@...nel.org>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc:     Sergei Shtylyov <sergei.shtylyov@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mips@...r.kernel.org
Subject: Re: [PATCH v5 net-next 10/10] dt-bindings: net: korina: Add DT
 bindings for IDT 79RC3243x SoCs

On Fri, Apr 16, 2021 at 03:35:36PM +0200, Thomas Bogendoerfer wrote:
> On Fri, Apr 16, 2021 at 12:29:46PM +0300, Sergei Shtylyov wrote:
> > On 16.04.2021 11:52, Thomas Bogendoerfer wrote:
> > 
> > > Add device tree bindings for ethernet controller integrated into
> > > IDT 79RC3243x SoCs.
> > > 
> > > Signed-off-by: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
> > > ---
> > >   .../bindings/net/idt,3243x-emac.yaml          | 74 +++++++++++++++++++
> > >   1 file changed, 74 insertions(+)
> > >   create mode 100644 Documentation/devicetree/bindings/net/idt,3243x-emac.yaml
> > > 
> > > diff --git a/Documentation/devicetree/bindings/net/idt,3243x-emac.yaml b/Documentation/devicetree/bindings/net/idt,3243x-emac.yaml
> > > new file mode 100644
> > > index 000000000000..3697af5cb66f
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/net/idt,3243x-emac.yaml
> > > @@ -0,0 +1,74 @@
> > > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/net/idt,3243x-emac.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: IDT 79rc3243x Ethernet controller
> > > +
> > > +description: Ethernet controller integrated into IDT 79RC3243x family SoCs
> > > +
> > > +maintainers:
> > > +  - Thomas Bogendoerfer <tsbogend@...ha.franken.de>
> > > +
> > > +allOf:
> > > +  - $ref: ethernet-controller.yaml#
> > > +
> > > +properties:
> > > +  compatible:
> > > +    const: idt,3243x-emac
> > > +
> > > +  reg:
> > > +    maxItems: 3
> > > +
> > > +  reg-names:
> > > +    items:
> > > +      - const: korina_regs
> > > +      - const: korina_dma_rx
> > > +      - const: korina_dma_tx
> > > +
> > > +  interrupts:
> > > +    items:
> > > +      - description: RX interrupt
> > > +      - description: TX interrupt
> > > +
> > > +  interrupt-names:
> > > +    items:
> > > +      - const: korina_rx
> > > +      - const: korina_tx
> > > +
> > > +  clocks:
> > > +    maxItems: 1
> > > +
> > > +  clock-names:
> > > +    items:
> > > +      - const: mdioclk
> > > +
> > > +required:
> > > +  - compatible
> > > +  - reg
> > > +  - reg-names
> > > +  - interrupts
> > > +  - interrupt-names
> > > +
> > > +additionalProperties: false
> > > +
> > > +examples:
> > > +  - |
> > > +
> > > +    ethernet@...00 {
> > > +        compatible = "idt,3243x-emac";
> > > +
> > > +        reg = <0x60000 0x10000>,
> > > +              <0x40000 0x14>,
> > > +              <0x40014 0x14>;
> > > +        reg-names = "korina_regs",
> > > +                    "korina_dma_rx",
> > > +                    "korina_dma_tx";
> > > +
> > > +        interrupts-extended = <&rcpic3 0>, <&rcpic3 1>;
> > 
> >    You use this prop, yet don't describe it?
> 
> that's just interrupt-parent and interrupts in one statement. And since
> make dt_binding_check didn't complained I thought that's good this way.
> Rob, do I need to describe interrupts-extended as well ?

No, the tooling handles both cases. What the parent is is outside the 
scope of a binding.

> I could change that to interrupt-parent/interrupts as the driver no
> longer uses dma under/overrun interrupts, which have a different
> interrupt-parent.

Humm, you should be describing the interrupt connections the h/w block 
has, not what the driver uses (today) or not.

Rob